#Tuner in bias amp 2 manual

Interestingly, there are parameters in the tuner you can change manually however, you have to remove the cover and then access the display and control buttons within the tuner. The pins on this connector go to the radio interface controls (+12, GND, TUNE START, COMPLETE).ДЄll of your comments make perfect sense wrt to MFJ hihi. You are correct, there is no connection from there to the outside. You could likely find a way to keep the unit waterproof and still connect the remote rig interface but personally I wouldn't go down that path unless it was actually my own tuner I was messing with.Д¬lick to expand.There is what appears on the schematic as an RJ-11 or RJ-45 style connector on the board. I suspect you'll find that all the components necessary to support vendor specific rig interfaces are actually on the PCB and the tuner only lacks the appropriate connectors. MFJ could have included the connectors to support rig interface for those that wanted to run the extra cable but that would have added parts and associated cost which isn't the kind of thing MFJ does very often. Sure, you may have already run a separate control cable to support your Icom tuner but for many hams contemplating a remote tuner purchase it's easier to just run power up the coax via a bias-T and not have to run additional cables. That's just economy of scale to repurpose their shack tuner as a remote tuner without having to layout and support a completely different design. If you've looked at the schematic then you've likely also noticed that the actual circuit board is the same as they use on their shack tuner and supports a display board and up down C/L controls but those also aren't used when this board is used as a remote feed point tuner. hihiД¬lick to expand.Because MFJ marketed this remote tuner as a simple coax fed device that only needs a bias-T on the shack end and doesn't need an additional control cable. or else it may by consequence become mine. I'm hesitant to do too much poking around or experimenting on my buddy's unit. If the components are on the board in the tuner, has anyone tried to use the Radio Interface feature with any success? Just curious.

#Tuner in bias amp 2 manual

Sadly, the 998RT manual states 'The Radio Interface function is not used in this tuner.' Why is that? I see in the schematic components for the feature however, I have not looked at whether the parts are actually on the board in the 998RT.

This is a great idea and would be so much simpler for users with radios that support such tuners. I read in the 998RT manual and observed on the schematic that circuits exist to support several manufacturers' radios that are capable of remote tuner use, as do other non-OEM tuners. I run the DC separate from the coax because I previously used an Icom AH-4 (great remote tuner, albeit max 120W) and that control cable now supplies the DC for the MFJ. Just borrowed the MFJ from a buddy to see if I want one. Anyone know why the 'Radio Interface' feature is not used in the MFJ-998RT Legal Limit tuner?